Die for forging.



W. S. THOMSON. DIE FOE FORGING. APPLIOATIYONV FILED I'EB. 4, 1010.

1,000,050, Patented Aug. 8, 1911.

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21/1272 55555 l/z Vii/7727p,

COLUMBIA PLANOGDAPH CO. WASHINGTON, D. C

UNTTE SATEB BATE @FTCE.

WILLIAM S. THOMSON, OF PLANTSVILLE, CONNECTICUT, ASSIGNOR TO THE H. D} SMITH AND COMPANY, OF PLANTSVILLE, CONNECTICUT, A CORPORATION.

DIE FOB. FORGING.

Specification of Letters Patent.

Patented Au s, 1911.

To all whom it may concern:

Be it known that I, VVILLIAM S. THOMSON, a citizen of the United States, residing at Plantsville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Dies for Forging, of which the following is a specification.

My invention relates to improvements in dies for forging, as especially applied to the subprocess of completing the heads of monkey wrenches formed on a bar of metal and the objects of my improvements are economy in manufacture, accuracy in the finished product and uniformity in detail of the individual members of large lots.

In the accompanying drawings :Figure 1 is a side elevation of the fiXed portion of the bottom die used in my process, showing a tool in position to be operated upon. Fig. 2 is a similar view of the sliding portion of the bottom die. Fig. 3 is a similar view of the top die. Fig. 4 is a front view of the parts shown in Figs. 1, 2 and 3, in their final position. Fig. 5 is a plan view of the part shown in Fig. 2. Fig. 6 is a side view on an enlarged scale of a head and part of a shank for a wrench ready for my process. Fig. 7 is a similar view of the same completed. Fig. 8 is a front view of the head shown in Fig. 6. F ig. 9 is a similar view of the head shown in Fig. 7.

lVhile my invention is shown as applied to a monkey wrench, the same process may be applied to other tools and objects having a generally similar arrangement of the shank and head.

A is the body part of a wrench ready for the application of my process, and comprises a shank 10 which has the original conformation of the bar from which said body part is formed and a head 11 which is formed thereon integral by the drop forging process in a well known manner, and which head 11 has around the periphery, along the middle line of the sides the flash 12, comprising a ridge or fin corresponding to the meeting edges of the dies in which the said head is formed.

B is the fixed portion of the bottom die used in my finishing process and comprises a block of metal having the usual formation of the bottom and front and back walls to fit the table or base of the press or drop by which the same is supported. Laterally the ends or sides 13 overhang the central body port-ion 14 so as to provide suficient length on one side or other or both for a way or ways 15 and 16 in the top for a lateral sliding of the sliding portion 0 of the bottom die laterally to a position away from and clear of said central portion. The said ways comprise a rear way 15 and a front way 16, which are inclined toward each other and meet to form a V groove or channel 33 extending longitudinally across the said fixed die B. The front top surface 34 of the block B is flattened off horizontally. The said V 33 and top surface 34 serve as guides and general support for the sliding block C, and permit of sliding the same laterally back and forth between a position in alinement with the said central body portion 1 1 and remote from said body portion as desired. The said fixed portion B of the die' has provided on the top side an open groove or channel 17 which is a fit for and adapted to receive the said shank 10 of the body part A, so that when the said shank is received therein the plane of the said fin or flash 12 will be atright angles to the length of the said lower block or die B. The bottom of said groove 17 as shown is inclined from the front upward at an angle of about 45 degrees. The back ton surface 19 of the block B, at the upper end of said groove 17 is inclined backward at an angle of 90 degrees to the bottom 18 of the groove 17, so that when the said shank 10 rests on the said bottom 18 the inner side 20 of the nose 21 of the head 11 will be adjacent said upper back surface 19 and separated therefrom by the thickness of the said flash or fin 12. Below the junction of the said shank 10 and head 11 an appreciable distance the said groove 17 may open out as at 22, to accom modate any enlargements of the said body part A, as for instance the handle portion 23. The upper portion 24 of said groove 17 adjacent said lower way 15 as stated is a fit for the said shank 10 and is of such depth that when the said shank lies therein the upper or back edge 25 of said shank will be flush with the said way 15. The back edge of said block B may have an upwardly extending ridge 35, the top surface of which may be horizontal and in the same plane as the said front top surface 34. The said sliding block C comprises a block of metal having on its bottom side a V formation 26 at the rear and a flattened portion 27 at the front fitting and adapted to be received. by the said V 33 and flattened surface 34 of the fixed block B. The back member of said V formation 26 constitutes the lower back surface, which joins at the corner 28 the upper back surface 29. The said corner 28 and upper. back surface conform to the junction of said back edge of the shank and the bottom heel surface 30 of the said head 11. The genera]. upper surface 36 is flattened as shown. After the said sliding die C has been slid into position as indicated on fixed die B, the said two portions C and B constitute essentially a single fixed or bottom die, having a portion surrounding the shank 10 and the head 11 protruding therefrom, a positive support being provided for the entire lower surface of the said head 11 where the same overhangs the shank 10. The top or striking die D comprises a block of metal having a general bottom surface 31 fitting the upper surface of the lower block made up of the lower fixed block B and sliding block C as a unit and having a cavity 32 conforming to the desired dimensions and shape of the finished head 11.

In operation when the said striking die D is dropped, the said fin or flash 12 is com- (pressed and is dispersed and distributed edgewise and generally into the body of the 30 head 11 and shank 10, which process involves the essential feature of my invention.

It is apparent that some changes from the specific construction herein disclosed may be made and therefore I do not wish to be 35 understood as limiting myself to the precise form of construction shown and described, but desire the liberty to make such changes, in working my invention, as may fairly come within the spirit and scope of the same.

I claim as my invention A die for finishing wrench heads comprising a fixed section B having a channel 17 for the shank of the wrench head, lateral ways 15 and 16 and an inclined surface 19,

a slidable section C, fitting said ways, a movable section D having a surface conforming in contour to the surfaces of parts B and C when assembled, and also having a cavity 32 conforming to the finished head Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

